Fuel-mixer for internal-combustion engines



E. SCHMITT.

FUEL MIXER FOB INTERNAL COMBUSTlON ENGINES.

APPLICATION FILED JUNE 5,1988.

Patented Mar. 8, 1921.;

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.L 2 9 1 0% L a M n m a P m w M l A w mm 0 2 9 0 7 3 1 2 SHEETS-SHEET 2 ,2,1, WW /Wwm EDMUND SCHMITT, 013 DETROIT, MICHIGAN.

FUEL-MIXER FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented Mar. 8, 1921.

Application filed. June 5, 1918. Serial No. 238.239.

T 0 all whom it may concern:

Be it known that I, EDMUND SCHMITT, a citizen of the United States of America, residing at Detroit, in the county of lVayne and State of Michigan, have invented certain new and useful Improvements in Fuel- Mixers for Internal-Combustion Engines, of which the following is a specification, reference being had thereinto the accom panying drawings.

The invention relates to fuel mixers for internal combustion engines and it is the object of the invention to secure a simple construction which is attachable to or insertable into the intake-manifold of the engine between the carburetor and the engine cylinders to thoroughly mix the gaseous mixture passing from the one into the other. Another object of the invention is to obtain a construction in which the gaseous mixture is thoroughly heated. A further object of the invention is to obtain a construction in which means is provided for admitting an auxiliary supply of fuel and air to the intake-manifold at a point below the mixer. Still other objects of the invention reside in the novel arrangements and combinations of parts as more fully hereinafter set forth.

In the drawings:

Figure l is a sectional side elevation of the intake-manifold and steering wheel, to which my invention is applied;

Fig. 2 is a sectional side elevation of the intake-manifold at right angles to that in Fig. 1;

Fig. 3 is a cross section on the line 33 of Fig. 2;

Fig. 4 is a side elevation of the mixer at right angles to that shown in Fig. 1.

A is the intake-manifold having the furcations B and B leading to the engine cylinders (not shown) and the tubular leg C, which may be either integral with or suitably connected to the furcation. The lower end of the leg has the laterally extending inlet C to which is connected the carbureter (not shown) and is threaded at C for engagement with the nut D having the recess D therein. E is the mixer insertiblewithin the leg 0 and preferably of one-piece construction, comprising the cylindrical solid core E extending axially of the leg and the inclined segmental plates F and F upon opposite sides of the core which form an approximately helical passage. These plates are arranged in staggered relation so that their edges do not abut, thereby forming a broken or interrupted helical passage for the gaseous mixture. Vith this arrangement the gaseous mixture in the channel between adjacent plates upon one side of the core upon passing to the opposite side of the core is divided so that some of the gaseous mixture passes around in the same channel while another portion advances into the next succeeding channel. The upper end of the tubular leg C has the inner shoulder C which is adapted to be engaged by the upper ends of the segmental plates F and F and the bottom of the recess D and yieldably forces the mixer upward and away from the nut so that the plates F and F are maintained in contact with the shoulder C F or the purpose of heating the gaseous mixture passing from the carbureter to the engine cylinders, the exhaust heater H is provided comprising the segmental cylindrical shell H extending around approximately one-half of the leg C, suitable packing l and I being pro-riled respectively between the sides and the top and bottom of the shell and leg for sealing the same. The inlet tube J of a substantially large diameter connects into the upper end of the shell H and the outlet tube J connects into the lower end of the shell H, this latter tube being of smaller diameter than the inlet tube so that the exhaust gases upon passing into the space between the shell H and leg U maintain the space i'illed and at the same time gradually pass through. the outlet tube. In other words, the heater acts as a muflier for the exhaust gases passing thereinto. Suitable securing means for the shell H is provided, such as the straps K secured to the shell and extending around the opposite side of the leg C.

For the purpose of providing an auxiliary fuel and air inlet, the nut D has the bore 1) extending therethrough in substantial axial alinement with the core E of the mixer. Connecting into this bore is the conduit L which leads to a suitable place to be con trolled by the driver of the engine. As shown, in the present instance, the conduit L leads to a position upon the steering wheel stem L beneath the steering wheel L The priming cup M is connected to the conduit at this point and has a suitable handle-0perated valve M for opening and closing the passage to the conduit. In starting the engine suitable fuel may be poured into the priming cup M and the valve M opened to allow this fuel to pass through the conduit L into the recess D in the nut D. The engine suction will draw air in through the priming cup M and conduit L, which air will pass up through the auxiliary fuel and atomize the same, carrying it up through the mixer where it will be thoroughly commingled with the gaseous mixture from the carbureter to make the same richer. With this construction auxiliary air alone can also be added.

In operation, the gaseous mixture upon leaving the carbureter passes through the lateral inlet C and engages the mixer E passing around the core E and between the plates F and F, a portion of this mixture passing from the plates at one side of the plates to the plates upon the opposite side so that part of the gaseous mixture is advanced and part passes through its preceding passage. The mixer compels the gaseous mixture to take a circuitous helical course but does not change the direction of flow of the same so that the gaseous mixture is thoroughly commingled and at the same time passes around that portion of the wall of the intake-manifold leg, which is heated by the exhaust gases and is thoroughly heated.

What I claim as my invention, is:

1. In an internal combustion engine, the combination with an intake-manifold having a tubular leg, of a mixer therewithin, comprising a core and inclined segmental plates thereon, a nut threadedly engaging the lower end of said leg, means for yield ably forcing said mixer away from said nut, a conduit connecting into said nut in substantial axial alinement with said core, and a valve for controlling the opposite end of said conduit.

the plates of each series being upon the same side of said core and the lower edges of the plates of one series alternating with the upper edges of the plates of the other series, whereby all of said plates form substantially helical interrupted circuitous pas- I sages.

3. The combination with an intake manifold having a tubular leg, of a mixer therewithin comprising a core extending longitudinally thereof, a series of inclined segmental plates upon one side of said core and a series of similarly inclined segmental plates upon the other side of said core, the edges of said plates being substantially in a plane parallel to the longitudinal axis of said core, and the lower edges of the plates of one series alternating with the upper edges of the plates of the other series, whereby both series form substantially helical interrupted circuitous passages.

4. The combination with an intake manifold, of a mixer therewithin, comprising a core extending longitudinally thereof, and a plurality of series of plates similarly inclined relative to the longitudinal axis of said core, said series extending longitudinally of said core, the plates of each series being connected to said core at spaced points along its length, and the upper edges of the plates of one series alternating with the lower edges of the plates of another series, whereby all of said plates form substantially helical interrupted circuitous passages.

In testimony whereof I aflix my signature.

EDMUND SCHMITT. 

